/*
 * AreaPlot.java
 *
 * Copyright (C) 2002-2006 Alexei Drummond and Andrew Rambaut
 *
 * This file is part of BEAST.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership and licensing.
 *
 * BEAST is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 *  BEAST is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with BEAST; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

package dr.gui.chart;

import dr.util.Variate;

import java.awt.*;
import java.awt.geom.GeneralPath;

/** 
 * Description:	An area plot.
 *
 * @author Andrew Rambaut	
 * @author Alexei Drummond	
 * @version	$Id: AreaPlot.java,v 1.4 2005/05/24 20:25:59 rambaut Exp $
 */

public class AreaPlot extends Plot.AbstractPlot {

	protected Variate xData2 = null;
	protected Variate yData2 = null;
		
	/**	
	* Constructor
	*/
	public AreaPlot(Variate xData, Variate yData) {
		super(xData, yData);
	}
	
	/**	
	* Constructor
	*/
	public AreaPlot(double[] xData, double[] yData) {
		super(xData, yData);
	}

	/**	
	* Constructor
	*/
	public AreaPlot(Variate xData1, Variate yData1, Variate xData2, Variate yData2) {
		super(xData1, yData1);
		this.xData2 = xData2;
		this.yData2 = yData2;
	}
	
	/**	
	* Constructor
	*/
	public AreaPlot(double[] xData1, double[] yData1, double[] xData2, double[] yData2) {
		super(xData1, yData1);
		this.xData2 = new Variate.Double(xData2);
		this.yData2 = new Variate.Double(yData2);
	}

	/**	
	*	Set data
	*/
	public void setData(double[] xData1, double[] yData1, double[] xData2, double[] yData2) {
		setData(xData1, yData1);
		this.xData2 = new Variate.Double(xData2);
		this.yData2 = new Variate.Double(yData2);
	}

	/**	
	*	Set data
	*/
	public void setData(Variate xData1, Variate yData1, Variate xData2, Variate yData2) {
		setData(xData1, yData1);
		this.xData2 = xData2;
		this.yData2 = yData2;
	}

	/**	
	*	Set axes
	*/
	public void setAxes(Axis xAxis, Axis yAxis) {
		super.setAxes(xAxis, yAxis);
		
		if (xData2 != null && yData2 != null) {
			setupAxis(xAxis, yAxis, xData2, yData2);
		}
	}

	/**	
	*	Resets axis ranges (if new data has been added)
	*/
	public void resetAxes() {
		super.resetAxes();
		
		if (xData2 != null && yData2 != null) {
			setupAxis(xAxis, yAxis, xData2, yData2);
		}
	}

	/**	
	*	Paint data series
	*/
	protected void paintData(Graphics2D g2, Variate xData, Variate yData) {
	
		double x0 = transformX(xData.get(0));
		double y0 = transformY(yData.get(0));
		
		GeneralPath path = new GeneralPath();
		path.moveTo((float)x0, (float)y0);
		
		boolean failed = false;
		double x = x0;
		double y = y0;
		
		for (int i = 1, n = xData.getCount(); i < n; i++) {
			x = transformX(xData.get(i));
			y = transformY(yData.get(i));
			path.lineTo((float)x, (float)y);
		}
		
		if (xData2 != null & yData2 != null) {
			for (int i = xData2.getCount() - 1; i >= 0; i--) {
				x = transformX(xData2.get(i));
				y = transformY(yData2.get(i));
				path.lineTo((float)x, (float)y);
			}
			
		} else {
			double y1 = transformY(0.0);
			path.lineTo((float)x, (float)y1);
			path.lineTo((float)x0, (float)y1);
			path.lineTo((float)x0, (float)y0);
		}

		path.closePath();
		
		g2.setPaint(linePaint);
		g2.setStroke(lineStroke);
			
		g2.fill(path);
	}
	
}

